Hi Bill,
Welcome to the AKSA Forum! You'll find a wealth of information here about building and using AKSAs, and everyone is delighted to share with you. It's a wonderful resource, and when the going gets tougher, I offer my 2c as well.
In response to requests from local 100W AKSA customers (and remember I live on an elegant carbuncle on the bottom of the world, so this cannot apply viably to North American or European customers!), I designed and built a workmanlike case from 2mm steel, powder coated, which utilizes the heatsinks as sides. You can see it here:
http://www.audiocircle.com/index.php?action=gallery;area=browse;album=393This case has caught the fancy of a number of constructors in Australia, and a couple in the US. It is very expensive to ship to the US - around $US185 in fact - and to buy is $AUD330 ($US260) with the fancy machined heatsinks. It's purpose built, so the assembly then becomes a breeze, and you could drive a small car over it without bending the panels. The US Audition Amp uses this case. But for obvious reasons I did not advertise this 'product' on the website.
I had 14 built, and have three left, but there are much more economical options in the States as shipping is certainly the killer. The Lansing case looks good, in fact.
I hope this puts it in perspective.
Cheers,
Hugh